Stuffing box for pressure stills



Jan. 28, 1930. F. E. WELLMAN 1,745,200

STUFFING BOX FOR PRESSURE STILLS Original Filed June 5. 1922 Patented Jan. 28, 1930 UNITED STATES PATENT OFFICE FRANK E. WELLHAN, OI KANSAS CITY, KANSAS, ASSIGNOB TO KANSAS CITY GASOLINE COMPANY, 01 KANSAS CITY, KANSAS, A COBPOBATION OI KANSAS STUIIING 30x FOR PRESSURE-STILLS Application filed June}, 1822, Serial My invention relates to stufling boxes, and has special reference to devices of this character as applied to pressure stills for the treatment of hydrocarbon oils. Its application is however not limited to such use, as will sufiiciently appear hereinafter.

. u ator or feed device.

The invention has for its object the production of a stufiing box that will resist high pressures without substantial leakage. I attain-my object by making the stufiing box in two halves, or in effect two tandem stufiing boxes, with one end exposed to the main source of pressure, and the intermediate space between them exposed through a suitable pressure conveying passage to the same pressure. In the case of an 011 still, the intermediate pressure pipe is connected to the still, and takes the same pressure to which stuffing box screwed or welde or otherwise secured to the wall 1, with an integral bottom 5, centrally perforated for the passage of the shaft 10, whichtypifies any suitable mechanical element that may be operated through a stufiing box, as for example the o crating rod of an indicator or pressure reg- 3 and 4 re resent the packing, in two sections separated y a spacer 15 having two heads 15 and 15" held apart by rods 15, the effect of this construction being to maintain an. open chamber 14 between the packing sections. Compression is secured by means of a land 6 having a flange 7 drawn down by b0 ts 8 welded or otherwise secured to the end of the 'acket 2.

A pipe 11 carries pressure mm the still 1 to the'space 14, being preferably provided with an interposed condenser 12, by means of which oil vapors carried over through pipe "No. 566,064. Renewed July 11, 1829.

11 will be cooled and condensed, so that only relatively cold oil will make its appearance in chamber 14.

The operation of the device will be clear from this description. The pressure su plied to chamber 14. equalizes that upon t e inner end of the inner stufling box, and any lcaka e through the outer stufiing box will be of co d oil, in negligible quantity and incapable of doing any damage.

In actual practice, with a 1%" shaft and approximate] 100 pounds pressure at approximately F., the leakage was less than a gallon per hour, and the temperature tiiereof so low that it would not burn the s nn.

In order to prevent the leakage from running down over the still, I provlde a trough or catch-basin 16, below the gland, with a drain pipe 17, and shall claim the same as part of my invention.

I claim:

In combination, a pressure oil still, 9. stuffing box having one end attached to said still, two separated sections of packing in said box with mechanical pressure transmitting means between them, means for exerting pressure upon said two sections of packing and said mechanical pressure transmittim means, in tandem, a shaft passing through said box and through the wall of the still, a condenser, and a vapor pipe from said still to the condenser, with a pipe from the bottom or drainage point of said condenser to signature.

' FRANKv E. WELLMAN. 

